Add 18/15 and 84/18
1st number: 1 3/15, 2nd number: 4 12/18
18/15 + 84/18 is 88/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
18/15 = 18 × 6/15 × 6 = 108/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
84/18 = 84 × 5/18 × 5 = 420/90 - Add the two like fractions:
108/90 + 420/90 = 108 + 420/90 = 528/90 - 528/90 simplified gives 88/15
- So, 18/15 + 84/18 = 88/15
In mixed form: 513/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15+84/18 18/30+84/18 18/15+84/36 54/15+84/18 18/45+84/18 18/15+84/54 90/15+84/18 18/75+84/18 18/15+84/90